Monkey-wrench.



PATENTED MAR.. zo, 1906.

No. 815,449. i,

A..T. .Mmmm MONKEY WRENCH.'

APPLICATION FILED OCT 16 190 To all whom, imayconcern:

UNITED sTATE-s PATENT onnrcn.

MONKEY-WRENCH.

Be it known that I, ALoNzo THEODORE MARTIN, of the city of NiagaraFalls, Vin the l county of Welland, in the Province of Ontario, Canada,have invented certain ynew and useful Improvements in Monkey-Wrenches,

4of which the following is a specification.

My invention relates to improvements in monkeyfwrenches and the like;and the ob-` ject of the invention is to devise a simple andcheaply-made wrench in which-the movable -jaw may be readily adjusted tograsp ldifferent sizes of nuts; and it consists, essentially,

of a stationary jaw and shank thereofprovided with ratchet-teeth and amovable jaw held on the shank and provided with a holy low front portionhaving located therein an engagingblock-and spring means for holding thesame to engage with the ratchet-teeth of the shank and alever pivoted onthe end ofv the-spring designed to throw the ratchettoothed block outkof engagement with the ratchet-teeth in the shank, the parts beingotherwise arranged and constructed in detail as hereinafter more.particularly explained.

Figure 1 is a perspective view of my improved wrench, showing portion ofthe ladclosely the interior of the hollow movable.

justable -j aw brokenaway to exhibit the in-v terior construction. Fig.2 is a side view showing the movable jaw in longitudinal section. Fig. 3is a detail of thecombined block,

spring, and lever. y

In the drawings like letters of reference indicate corresponding partsin each iigure.

A is the main shank, which is providedl with theusual end jaw A. B Aisthe usual handle, which is adjustably fastened to the reduced end of theshank A in any suitable manner or as shown. The shank A is p'rovidedwitha series of ratchet-teeth A? on that side edge on which the jaw islocated.

Cis the movable jaw, which is provided with the usual openings C and C2,through which theshank extends. i It will be noticed that the frontvportion of the jaw, or more pro erly the jaw proper, is elongated inform an hollow,the inside web O3 being provided with an arc-shaped endC4 and the outside web being provided with a slot C5.

D isa block which is provided with ratchet# teeth D', designed to engagewith the ratchetteeth A2. Thev block D has secured to it thesubstantially elliptical spring D2, which iits jaw C. The upper endofthe block D is pro-A vided with an arc-shaped recess D3, so that 'itVSpecification of Letters Patent. i

Eanented Marcil 20, 1906.

may swing or pivot on the arc-shaped ends of the webs C3. E is thethumb-lever, which is pivoted in, eyes D4 on they lower inwardly-offsetend of the s yring D2. The lever E extends through the s otrC, and theinner curved end of the lever projects within the inner end D5 ofthespring D2 beneath the block D.

In order `to mani ulate the movable jaw and adjust it to and iiom thenut, which may 4-be between itl and the stationary jaw, all it isnecessary to do is to grasp the wrench around lthe movablej aw and bypressing in on the lever E such lever is -tilted on its ivot, and

` thereby by means of its inner en force out the 4teeth D of the block Dfrom engagement with the 'teeth A?, so that the movable j aw-C l maybeslid freely backwardly and forwardly on the shank A into the properposition for adjustment and is rigid when the lever E may be released. 1

It is essentially impor-.tant that the block D pivots or hinges on thearc-shaped end C4 of the web C3 in order lthat the block may be freedproperly from the ratchet-teeth as well as `allow of it being swung backreadily into position, so as to insure the ratchet-teeth of the blockbeing heldin engagement with the ratchet-teeth of the shank.

f Such-a form of wrench as I describe is very j simple, cheap to make,and easily4 manipulated even by one hand, which is an importantdesideratum.` A

What I claim as my inhvention' is-- 1. In 'a wrench, the combinationwith the stationary j aw and shank having the teeth on the side of theshank in which the jaw is located, of the movable jaw through openingsin which the shank extends having a front hollowportion, a block locatedin said hollow portion and provided with corresponding teeth to engagethe teeth in the shank and a spring connected to the block and designedto normally ress the same against the shank, and a ever designed toengage with the end of the spring underneath the block and designed torelease the teeth of the block from the teeth of the shank by the innerpressure of the outer end of the lever as and for the purpose specified.

2. In a wrench, in combination the shank provided with a stationary jawand edge teeth, the hollow movable jaw through openi 4ings in which theshank extends provided with an inner web having an arc-shaped bot- IIOoted in the eye and having the inner end eX- tending inwardly of 'thefree edge of the spring and the outer end extending through a slot inthe movable jaw as and for the purpose specified.

ALONZO THEODORE MARTN. Witnesses:

v i ALEX. FRASER,

EDITH EDMAND.

